A narrow focus on online gaming and too little on big single-player experiences, lack of truly impactful exclusives. Mandatory Kinect was massively stupid and drove up the price a fair bit while having zero proper integration with and/or effect on actual gaming. Remnants of a bad reputation from the insane failure rates of the Xbox 360 were another factor for sure. No one year head start to one-up Sony this time, with a resurgence in MS' PC gaming efforts, some toll was taken out on the Xbox brand, a brand that has very little support in MS as a whole. The presentation, DRM solutions and overall PR surrounding the reveal and consequent info dumps were all disastrous as well, quite a few mistakes were made even before the thing launched ("for those who don't have a 24-hour connection, we have the Xbox 360").
From where I'm sitting, it makes perfect sense that the Xbox has been trounced. I own both machines, and I find that neither of them is especially appealing in their design, interfaces, and menus, but the PS4 has so many amazing single-player games. I have only two games I mainly play on Xbox One, even though I want to play single-player only, they both make it a point to constantly nag me about not playing multiplayer online (I'm having huge disadvantages because of this) and more or less hammer in my point about narrow focus on online, along with the constant begging about joining Live every damn time I start up a game. For a person like me, mid-30's, who enjoys single-player most of all and has enough to shell out on games, the PS4 is the obvious choice, along with the PC.
Kudos for making an SKU with 4K Blu-ray support though, it's still comical that Sony won't sell a console to support their own film format (this is among the main reasons I bought my Xbox One Slim). Another kudos for not diving headlong into the VR scene, it seems to have been really slow overall (PS VR seems to be around the 5-5.5 million mark, meaning less than 5% attach rate).







